Calibrachoa plant named ‘Suncalkuki’

ABSTRACT

A new and distinct cultivar of  Calibrachoa  plant named ‘Suncalkuki’, characterized by its trailing plant habit; moderately vigorous growth habit; freely branching and flowering plant habit; long flowering period; yellow-colored flowers; and good garden performance.

Botanical designation: Calibrachoa sp.

Cultivar denomination: ‘SUNCALKUKI’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Calibrachoa plant, botanically known as Calibrachoa sp. and hereinafter referred to by the name ‘Suncalkuki’.

The new Calibrachoa plant is a product of a planned breeding program conducted by the Inventor in Higashiomi, Shiga, Japan. The objective of the breeding program is to develop new trailing and freely-branching Calibrachoa cultivars with attractive and unique flower coloration.

The new Calibrachoa plant originated from a cross-pollination conducted by the Inventor in Higashiomi, Shiga, Japan in April, 2004 of a proprietary selection of Calibrachoa sp. identified as code number R101, not patented, as the female, or seed, parent with a proprietary selection of Calibrachoa sp. identified as code number C31, not patented, as the male, or pollen, parent. The new Calibrachoa was discovered and selected by the Inventor as a single flowering plant from within the progeny of the stated cross-pollination in a controlled greenhouse environment in Higashiomi, Shiga, Japan in September, 2005.

Asexual reproduction of the new Calibrachoa plant by vegetative cuttings in a controlled greenhouse environment in Higashiomi, Shiga, Japan since October, 2005, has shown that the unique features of this new Calibrachoa plant are stable and reproduced true to type in successive generations.

SUMMARY OF THE INVENTION

Plants of the new Calibrachoa have not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment and cultural practices such as temperature and light intensity without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Suncalkuki’. These characteristics in combination distinguish ‘Suncalkuki’ as a new and distinct cultivar of Calibrachoa:

-   -   1. Trailing plant habit.     -   2. Moderately vigorous growth habit.     -   3. Freely branching and flowering plant habit.     -   4. Long flowering period.     -   5. Yellow-colored flowers.     -   6. Good garden performance.

Plants of the new Calibrachoa can be compared to plants of the female parent selection. Plants of the new Calibrachoa differ primarily from plants of the female parent selection in the following characteristics:

-   -   1. Plants of the new Calibrachoa are more trailing than plants         of the female parent selection.     -   2. Plants of the new Calibrachoa and the female parent selection         differ in flower color as plants of the female parent selection         have red-colored flowers.

Plants of the new Calibrachoa can be compared to plants of the male parent selection. Plants of the new Calibrachoa differ primarily from plants of the male parent selection in flower color as plants of the male parent selection have pale yellow-colored flowers.

Plants of the new Calibrachoa can also be compared to plants of ‘Sunbelki’, disclosed in U.S. Plant Pat. No. 11,558. In side-by-side comparisons conducted in Higashiomi, Shiga, Japan, plants of the new Calibrachoa and ‘Sunbelki’ differed primarily in the following characteristics:

-   -   1. Plants of the new Calibrachoa were more trailing than plants         of ‘Sunbelki’.     -   2. Plants of the new Calibrachoa were more compact than and not         as vigorous as plants of ‘Sunbelki’.     -   3. Plants of the new Calibrachoa were more freely branching than         plants of ‘Sunbelki’.     -   4. Plants of the new Calibrachoa had smaller leaves than plants         of ‘Sunbelki’.     -   5. Plants of the new Calibrachoa and ‘Sunbelki’ differed in         flower color as plants of ‘Sunbelki’ had darker yellow-colored         flowers.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying colored photographs illustrate the overall appearance of the new Calibrachoa, showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photographs may differ slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Calibrachoa.

The photograph at the top of the sheet comprises a side perspective view of a typical flowering plant of ‘Suncalkuki’ grown in a container.

The photograph at the bottom of the sheet is a close-up view of typical flowers of ‘Suncalkuki’.

DETAILED BOTANICAL DESCRIPTION

The aforementioned photographs and following observations, measurements and values describe plants grown in 15-cm containers in Higashiomi, Shiga, Japan, under commercial practice during the summer in an outdoor nursery. During the production of the plants, day temperatures averaged 23° C. and night temperatures averaged 13° C. Plants had been growing for four and five months when the description and photographs, respectively, were taken. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2001 Edition, except where general terms of ordinary dictionary significance are used.

-   Botanical classification: Calibrachoa sp. ‘Suncalkuki’. -   Parentage:     -   -   Female, or seed, parent.—Proprietary selection of             Calibrachoa sp. identified as code number R101, not             patented.         -   Male, or pollen, parent.—Proprietary selection of             Calibrachoa sp. identified as code number C31, not patented. -   Propagation:     -   -   Type.—By vegetative cuttings.         -   Time to initiate roots.—About one week at 15° C. to 20° C.         -   Time to produce a rooted young plant.—About three weeks at             15° C. to 20° C.         -   Root description.—Fibrous; white in color.         -   Rooting habit.—Freely branching. -   Plant description:     -   -   Plant and growth habit.—Trailing plant habit; freely             branching habit with numerous lateral branches developing             per plant; pinching is not required, but will enhance             lateral branch development; moderately vigorous growth             habit.         -   Plant height.—About 10.2 cm.         -   Plant diameter.—About 44.6 cm. -   Lateral branch description:     -   -   Length.—About 23 cm.         -   Diameter.—About 1.1 mm.         -   Internode length.—About 1.4 cm.         -   Strength.—Strong.         -   Aspect.—Upright to outward.         -   Texture.—Pubescent.         -   Color: Close to 144A. -   Foliage description:     -   -   Arrangement.—Alternate, simple.         -   Length.—About 2.6 cm.         -   Width.—About 8 mm.         -   Shape.—Narrowly elliptic.         -   Apex.—Rounded.         -   Base.—Cuneate.         -   Margin.—Entire.         -   Texture, upper and lower surfaces.—Pubescent.         -   Venation pattern.—Pinnate; reticulate.         -   Color.—Developing and fully expanded leaves, upper surface:             Close to 138A; venation, close to 145A. Developing and fully             expanded leaves, lower surface: Close to 138B; venation,             close to 145A.         -   Petiole.—Length: About 3 mm. Diameter: About 1 mm. Texture,             upper and lower surfaces: Sparsely pubescent. Color, upper             and lower surfaces: Close to 145A. -   Flower description:     -   -   Flower arrangement and habit.—Single salverform flowers             arising from upper leaf axils; freely flowering habit with             usually about 64 open flowers per plant at one time; flowers             face upright or outwardly.         -   Fragrance.—None detected.         -   Natural flowering season.—Early flowering habit, plants of             the new Calibrachoa initiate and develop flowers about three             to four weeks after planting. Long flowering period;             flowering commences naturally during the spring and plants             flower continuously throughout the summer until late autumn             in Japan.         -   Flower longevity.—Individual flowers last about seven to ten             days on the plant; flowers not persistent.         -   Flower diameter.—About 3.1 cm.         -   Flower length (depth).—About 2.7 cm.         -   Throat diameter.—About 7.6 mm.         -   Tube length.—About 1.8 cm.         -   Tube diameter.—About 1.7 mm.         -   Flower bud.—Shape: Cylindrical. Length: About 2.1 cm.             Diameter: About 5.8 mm. Color: Close to 150D.         -   Corolla.—Arrangement: Five petals fused at the base and             opening into a flared trumpet. Petal length from throat:             About 1.2 cm. Petal width: About 1.4 cm. Petal shape:             Spatulate. Petal apex: Acute to acuminate. Petal margin:             Entire. Petal texture, upper and lower surfaces: Smooth,             glabrous. Throat texture: Smooth, glabrous. Tube texture:             Pubescent. Color: Petal, when opening, upper surface: Close             to 6C; towards the throat, close to 7A. Petal, when opening,             lower surface: Close to 6D. Petal, fully opened, upper             surface: Close to 6C; towards the throat, close to 7A.             Petal, fully opened, lower surface: Close to 2D. Throat:             Close to 8C. Tube: Close to 8C.         -   Calyx.—Arrangement: One star-shaped calyx tube with five             sepals fused at the base. Sepal length: About 6.4 mm. Sepal             width: About 2.4 mm. Sepal shape: Lanceolate. Sepal apex:             Acute. Sepal margin: Entire. Sepal texture, upper and lower             surfaces: Pubescent. Color, immature and mature, upper             surface: Close to 144A. Color, immature and mature, lower             surface: Close to 144B.         -   Peduncles.—Length: About 1.3 cm. Diameter: About 0.7 mm.             Angle: Mostly outward. Strength: Strong. Texture: Pubescent.             Color: Close to 144A.         -   Reproductive organs.—Stamens: Quantity/arrangement: Five per             flower. Stamen length: About 1 cm. Anther shape:             Ellipsoidal. Anther size: About 1.6 mm by 1.4 mm. Anther             color: Close to 8B. Pollen amount: Moderate. Pollen color:             Close to 8B. Pistils: Quantity: One per flower. Pistil             length: About 1 cm. Style color: Close to 144D. Stigma             shape: Transversely ellipsoidal. Stigma color: Close to             144A. Ovary color: Close to 144A. Seed/fruit: Seed and fruit             development have not been observed on plants of the new             Calibrachoa. -   Garden performance: Plants of the new Calibrachoa have been observed     to have good garden performance and to tolerate wind, rain and     temperatures ranging from about 5° C. to about 35° C. -   Pathogen/pest resistance: Plants of the new Calibrachoa have not     been observed to be resistant to pests and pathogens common to     Calibrachoa. 

1. A new and distinct Calibrachoa plant named ‘Suncalkuki’0 as illustrated and described. 